this->child = child;
if ( mlt_service_init( service, this ) == 0 )
{
+ mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
+
service->get_frame = transition_get_frame;
+ service->close = ( mlt_destructor )mlt_transition_close;
+ service->close_object = this;
+
+ mlt_properties_set_position( properties, "in", 0 );
+ mlt_properties_set_position( properties, "out", 0 );
+ mlt_properties_set_int( properties, "a_track", 0 );
+ mlt_properties_set_int( properties, "b_track", 1 );
+
return 0;
}
return 1;
}
+/** Create a new transition.
+*/
+
+mlt_transition mlt_transition_new( )
+{
+ mlt_transition this = calloc( 1, sizeof( struct mlt_transition_s ) );
+ if ( this != NULL )
+ mlt_transition_init( this, NULL );
+ return this;
+}
+
/** Get the service associated to the transition.
*/
mlt_service mlt_transition_service( mlt_transition this )
{
- return &this->parent;
+ return this != NULL ? &this->parent : NULL;
}
/** Get the properties interface.
mlt_properties mlt_transition_properties( mlt_transition this )
{
- return mlt_service_properties( mlt_transition_service( this ) );
+ return MLT_TRANSITION_PROPERTIES( this );
}
/** Connect this transition with a producers a and b tracks.
int ret = mlt_service_connect_producer( &this->parent, producer, a_track );
if ( ret == 0 )
{
+ mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
this->producer = producer;
- this->a_track = a_track;
- this->b_track = b_track;
- this->in = 0;
- this->out = 0;
+ mlt_properties_set_int( properties, "a_track", a_track );
+ mlt_properties_set_int( properties, "b_track", b_track );
}
return ret;
}
/** Set the in and out points.
*/
-void mlt_transition_set_in_and_out( mlt_transition this, mlt_timecode in, mlt_timecode out )
+void mlt_transition_set_in_and_out( mlt_transition this, mlt_position in, mlt_position out )
{
- this->in = in;
- this->out = out;
+ mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
+ mlt_properties_set_position( properties, "in", in );
+ mlt_properties_set_position( properties, "out", out );
}
/** Get the index of the a track.
int mlt_transition_get_a_track( mlt_transition this )
{
- return this->a_track;
+ return mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "a_track" );
}
/** Get the index of the b track.
int mlt_transition_get_b_track( mlt_transition this )
{
- return this->b_track;
+ return mlt_properties_get_int( MLT_TRANSITION_PROPERTIES( this ), "b_track" );
}
/** Get the in point.
*/
-mlt_timecode mlt_transition_get_in( mlt_transition this )
+mlt_position mlt_transition_get_in( mlt_transition this )
{
- return this->in;
+ return mlt_properties_get_position( MLT_TRANSITION_PROPERTIES( this ), "in" );
}
/** Get the out point.
*/
-mlt_timecode mlt_transition_get_out( mlt_transition this )
+mlt_position mlt_transition_get_out( mlt_transition this )
{
- return this->out;
+ return mlt_properties_get_position( MLT_TRANSITION_PROPERTIES( this ), "out" );
}
/** Process the frame.
+
+ If we have no process method (unlikely), we simply return the a_frame unmolested.
*/
-static mlt_frame transition_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
+mlt_frame mlt_transition_process( mlt_transition this, mlt_frame a_frame, mlt_frame b_frame )
{
if ( this->process == NULL )
- {
- if ( !mlt_frame_is_test_card( a_frame ) )
- {
- mlt_frame_close( b_frame );
- return a_frame;
- }
- else
- {
- mlt_frame_close( a_frame );
- return b_frame;
- }
- }
+ return a_frame;
else
- {
return this->process( this, a_frame, b_frame );
- }
}
/** Get a frame from this filter.
method for all tracks, we have to take special care that we only obtain the a and
b frames once - we do this on the first call to get a frame from either a or b.
- After that, we have 3 cases to resolve:
+ After that, we have 2 cases to resolve:
1) if the track is the a_track and we're in the time zone, then we need to call the
- process method to do the effect on the frame (we assign NULL to the a_frame and
- b_frames here) otherwise, we pass on the a_frame unmolested;
- 2) if the track is the b_track and we're the in the time zone OR the b_frame is NULL,
- then we generate a test card frame, otherwise we pass on the b frame unmolested;
- 3) For all other tracks, we get the frames on demand.
+ process method to do the effect on the frame and remember we've passed it on
+ otherwise, we pass on the a_frame unmolested;
+ 2) For all other tracks, we get the frames on demand.
*/
static int transition_get_frame( mlt_service service, mlt_frame_ptr frame, int index )
{
mlt_transition this = service->child;
- // Fetch a and b frames together...
- if ( ( index == this->a_track || index == this->b_track ) &&
- ( this->a_frame == NULL && this->b_frame == NULL ) )
+ mlt_properties properties = MLT_TRANSITION_PROPERTIES( this );
+
+ int accepts_blanks = mlt_properties_get_int( properties, "_accepts_blanks" );
+ int a_track = mlt_properties_get_int( properties, "a_track" );
+ int b_track = mlt_properties_get_int( properties, "b_track" );
+ mlt_position in = mlt_properties_get_position( properties, "in" );
+ mlt_position out = mlt_properties_get_position( properties, "out" );
+ int always_active = mlt_properties_get_int( properties, "always_active" );
+
+ if ( ( index == a_track || index == b_track ) && !( this->a_held || this->b_held ) )
{
- mlt_service_get_frame( this->producer, &this->a_frame, this->a_track );
- mlt_service_get_frame( this->producer, &this->b_frame, this->b_track );
+ mlt_service_get_frame( this->producer, &this->a_frame, a_track );
+ mlt_service_get_frame( this->producer, &this->b_frame, b_track );
+ this->a_held = 1;
+ this->b_held = 1;
}
// Special case track processing
- if ( index == this->a_track )
+ if ( index == a_track )
{
// Determine if we're in the right time zone
- mlt_timecode timecode = mlt_frame_get_timecode( this->a_frame );
- if ( timecode >= this->in && timecode < this->out )
+ mlt_position position = mlt_frame_get_position( this->a_frame );
+ if ( always_active || ( position >= in && position <= out ) )
{
- // Process the transition
- *frame = transition_process( this, this->a_frame, this->b_frame );
-
- // Important - NULL both frames now so that we know they're done...
- this->a_frame = NULL;
- this->b_frame = NULL;
+ if ( !accepts_blanks && ( this->b_frame == NULL || ( mlt_frame_is_test_card( this->b_frame ) && mlt_frame_is_test_audio( this->b_frame ) ) ) )
+ {
+ *frame = this->a_frame;
+ }
+ else if ( !accepts_blanks && ( this->a_frame == NULL || ( mlt_frame_is_test_card( this->a_frame ) && mlt_frame_is_test_audio( this->a_frame ) ) ) )
+ {
+ mlt_frame t = this->a_frame;
+ this->a_frame = this->b_frame;
+ this->b_frame = t;
+ *frame = this->a_frame;
+ }
+ else
+ {
+ int hide = 0;
+ *frame = mlt_transition_process( this, this->a_frame, this->b_frame );
+ if ( !mlt_properties_get_int( MLT_FRAME_PROPERTIES( this->a_frame ), "test_image" ) )
+ hide = 1;
+ if ( !mlt_properties_get_int( MLT_FRAME_PROPERTIES( this->a_frame ), "test_audio" ) )
+ hide |= 2;
+ mlt_properties_set_int( MLT_FRAME_PROPERTIES( this->b_frame ), "hide", hide );
+ }
+ this->a_held = 0;
}
else
{
// Pass on the 'a frame' and remember that we've done it
*frame = this->a_frame;
- this->a_frame = NULL;
- }
+ this->a_held = 0;
+ }
return 0;
}
- if ( index == this->b_track )
+ if ( index == b_track )
{
- if ( this->b_frame == NULL )
- {
- // We're *probably* in the zone and the a frame has been requested
- *frame = mlt_frame_init( );
- }
- else
- {
- mlt_timecode timecode = mlt_frame_get_timecode( this->b_frame );
- if ( timecode >= this->in && timecode < this->out )
- {
- // We're in the zone, but the 'a frame' has not been requested yet
- *frame = mlt_frame_init( );
- }
- else
- {
- // We're out of the zone, pass on b and remember that we've done it
- *frame = this->b_frame;
- this->b_frame = NULL;
- }
- }
+ // Pass on the 'b frame' and remember that we've done it
+ *frame = this->b_frame;
+ this->b_held = 0;
return 0;
}
else
void mlt_transition_close( mlt_transition this )
{
- if ( this->close != NULL )
- this->close( this );
- else
- mlt_service_close( &this->parent );
+ if ( this != NULL && mlt_properties_dec_ref( MLT_TRANSITION_PROPERTIES( this ) ) <= 0 )
+ {
+ this->parent.close = NULL;
+ if ( this->close != NULL )
+ {
+ this->close( this );
+ }
+ else
+ {
+ mlt_service_close( &this->parent );
+ free( this );
+ }
+ }
}
projects / mlt / blobdiff